CVE-2026-5442

Name: CVE-2026-5442
Creator: NVD / NIST
Published: 2026-04-09T15:16:16.543+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.60%

Last modified Jun 17, 2026

CVE-2026-5442 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (UL), instead of the expected VR Unsigned Short (US), which allows extremely large dimensions to be processed. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

Description

A heap buffer overflow vulnerability exists in the DICOM image decoder. Dimension fields are encoded using Value Representation (VR) Unsigned Long (UL), instead of the expected VR Unsigned Short (US), which allows extremely large dimensions to be processed. This causes an integer overflow during frame size calculation and results in out-of-bounds memory access during image decoding.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.60%

44.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Orthanc-Server	Orthanc	< 1.12.11

References

https://kb.cert.org/vuls/id/536588Third Party Advisory, VDB Entry
https://www.machinespirits.de/Not Applicable
https://www.orthanc-server.com/Product

Timeline

Published: Apr 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-5442?

How severe is CVE-2026-5442?

CVE-2026-5442 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.

How do I fix CVE-2026-5442?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-5442?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST